A 60 keV neutral Lithium beam system was designed and built up for beam emission spectroscopy measurement of edge plasma on KSTAR. The measurement will be the complementary of the heating beam based emission spectroscopy system which was built up in 2012, using the same observation system with different interference filters. The electron density and its fluctuation, thus the density distributio...

Formation of keV-energy Ar cluster ion beam is studied. Optimum condition for formation high intensity cluster beam with 2*10 16 clusters/sm 2 *sec investigated both experimentally and by numerical simulation. The mass distributions of the accelerated cluster ion beam were measured. It has been demonstrated that mass spectrum of cluster ion depend of collision processes between the ions during ...

............................................................................................................... 3 43 PREFACE .................................................................................................................... 4 44 MAIN POINTS ............................................................................................................ 6 45 GLOSSARY ..................

To study the fast-ion transport in a well controlled background plasma, a 3-cm diameter rf ion gun launches a pulsed, ,300 eV ribbon shaped argon ion beam parallel to or at 15° to the magnetic field in the Large Plasma Device sLAPDd fW. Gekelman, H. Pfister, Z. Lucky, J. Bamber, D. Leneman, and J. Maggs, Rev. Sci. Instrum. 62, 2875 s1991dg at UCLA. The parallel energy of the beam is measured by...

Using a focused ion beam, we patterned epitaxial graphene on SiC into an array of graphene nanoribbons as narrow as 15 nm by optimizing the Ga(+) ion beam current, acceleration voltage, dwell time, beam center-to-center distance and ion dose. The ion dose required to completely etch away graphene on SiC was determined and compared with the Monte Carlo simulation result. In addition, a photodete...

NCSX has been designed to accommodate a variety of heating systems, including ohmic heating, neutral beam injection, and RF. Neutral beams will provide one of the primary heating methods for NCSX. In addition to plasma heating, neutral beams are also expected to provide a means for external control over the level of toroidal plasma rotation velocity and its profile. The experimental plan requir...

Beam-loss monitors in the SLC Final Focus System &e used for protection of accelerator and detector components, optimizing adjustment of beam halo collimators, and as diagnostics of beam size and halo. Construction of a variety of monitors based on discrete ion chambers, proportional tubes, continuous 'ion chambers, and signals from the Mark II detector is reported. The interfaces to the SLC co...

Introduction: Computed tomography (CT) has numerous applications in clinical procedures but its main problem is its high radiation dose to the patients compared to other imaging modalities using x-ray. CT delivers approximately high doses to the nearby tissues due to the scattering effect, fan beam (beam divergence) and limited collimator efficiency. The radiation dose from multi-slice scanners...

Space-charge becomes increasingly significant at high beam intensities such as used in FEL injectors and heavy ion inertial fusion drivers, where it dominates the beam dynamics. The University of Maryland Electron Ring (UMER) is a high intensity circular machine that is dedicated to the study of long path length space-chargedominated beam physics on a small scale. Over multiple turns, longitudi...